nit: Pass ownership of CVDelegate to ContentVerifier using unique_ptr.

extensions/browser/content_verifier.cc

Index: extensions/browser/content_verifier.cc
diff --git a/extensions/browser/content_verifier.cc b/extensions/browser/content_verifier.cc
index fe04423791f8d89ec6dd634ded774e02dba2dd27..c48d7eb254f65cc2e1a0716eb32105065ac740fc 100644
--- a/extensions/browser/content_verifier.cc
+++ b/extensions/browser/content_verifier.cc
@@ -60,15 +60,16 @@ void ContentVerifier::SetObserverForTests(TestObserver* observer) {
   g_test_observer = observer;
 }
 
-ContentVerifier::ContentVerifier(content::BrowserContext* context,
-                                 ContentVerifierDelegate* delegate)
+ContentVerifier::ContentVerifier(
+    content::BrowserContext* context,
+    std::unique_ptr<ContentVerifierDelegate> delegate)
     : shutdown_(false),
       context_(context),
-      delegate_(delegate),
+      delegate_(std::move(delegate)),
       fetcher_(new ContentHashFetcher(
           content::BrowserContext::GetDefaultStoragePartition(context)
               ->GetURLRequestContext(),
-          delegate,
+          delegate_.get(),
           base::Bind(&ContentVerifier::OnFetchComplete, this))),
       observer_(this),
       io_data_(new ContentVerifierIOData) {}